I need to graph .
I understand subbing in values for X to get Y. The graph is a positive (opens upwards) parabola.
The inverse would be.
As for graphing, I usually use x values of -3,-2,-1,0,1,2,3.
Do I substitute those values into the inverse equation the same I would the regular function?
If I sub the value of 0 in for X, then X-4 = -4. Then nothing is the square of -4.
How do I calculate to find Y properly, when working with an inverse equation?
Is there someway to find out what values of x to start with when I don't have access to an applet, or do I just use trial and error until I find a number that can be squared?
So now I can substitute values into x, and I would assume that I should only use the y values which end up as a whole number, ie.
if x = 8, then which then equals
Is making an xy graph possible for inverse, how do I properly show the values on paper before I attempt to graph the points?
The inverse function reverses domain and range. The inverse function would have domain "all real numbers larger than or equal to 4" and range "all real numbers". The fact that the domain is "all real numbers large than or equal to 4" is why you cannot put, say, x= 3 or x= 2, in for x.
Of course, this function, is not "one-to-one" and so does not have a true inverse. You have to break it into two functions, and in order to get the entire range of "all real numbers".